EP1295468A1 - Preventing doming phenomena - Google Patents
Preventing doming phenomenaInfo
- Publication number
- EP1295468A1 EP1295468A1 EP01984024A EP01984024A EP1295468A1 EP 1295468 A1 EP1295468 A1 EP 1295468A1 EP 01984024 A EP01984024 A EP 01984024A EP 01984024 A EP01984024 A EP 01984024A EP 1295468 A1 EP1295468 A1 EP 1295468A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit
- histogram
- luminance
- beam current
- circuit according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/57—Control of contrast or brightness
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/57—Control of contrast or brightness
- H04N5/59—Control of contrast or brightness in dependence upon beam current of cathode ray tube
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/20—Circuitry for controlling amplitude response
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
- Picture Signal Circuits (AREA)
- Prostheses (AREA)
- Pens And Brushes (AREA)
- Materials For Medical Uses (AREA)
- Image Processing (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01984024A EP1295468B1 (en) | 2000-06-13 | 2001-05-15 | Preventing doming phenomena |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00202057 | 2000-06-13 | ||
EP00202057A EP1164784A1 (en) | 2000-06-13 | 2000-06-13 | Preventing doming phenomena |
PCT/EP2001/005574 WO2001097508A1 (en) | 2000-06-13 | 2001-05-15 | Preventing doming phenomena |
EP01984024A EP1295468B1 (en) | 2000-06-13 | 2001-05-15 | Preventing doming phenomena |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1295468A1 true EP1295468A1 (en) | 2003-03-26 |
EP1295468B1 EP1295468B1 (en) | 2004-10-27 |
Family
ID=8171624
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00202057A Withdrawn EP1164784A1 (en) | 2000-06-13 | 2000-06-13 | Preventing doming phenomena |
EP01984024A Expired - Lifetime EP1295468B1 (en) | 2000-06-13 | 2001-05-15 | Preventing doming phenomena |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00202057A Withdrawn EP1164784A1 (en) | 2000-06-13 | 2000-06-13 | Preventing doming phenomena |
Country Status (8)
Country | Link |
---|---|
US (1) | US6741295B2 (en) |
EP (2) | EP1164784A1 (en) |
JP (1) | JP2004503959A (en) |
KR (1) | KR20020029100A (en) |
CN (1) | CN1197349C (en) |
AT (1) | ATE281040T1 (en) |
DE (1) | DE60106761T2 (en) |
WO (1) | WO2001097508A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100393219B1 (en) * | 2001-03-13 | 2003-07-31 | 삼성전자주식회사 | Automatic beam limiter circuit |
JP3874658B2 (en) * | 2001-12-12 | 2007-01-31 | 三星エスディアイ株式会社 | Contrast correction circuit |
JP2004032551A (en) * | 2002-06-27 | 2004-01-29 | Seiko Epson Corp | Image processing method, image processor, and projector |
JP3844075B2 (en) * | 2003-01-17 | 2006-11-08 | セイコーエプソン株式会社 | Image processing system, projector, program, information storage medium, and image processing method |
JP3871061B2 (en) * | 2003-03-25 | 2007-01-24 | セイコーエプソン株式会社 | Image processing system, projector, program, information storage medium, and image processing method |
US8000554B2 (en) * | 2007-04-04 | 2011-08-16 | Xerox Corporation | Automatic dynamic range adjustment in digital imaging |
TWI390483B (en) * | 2007-04-27 | 2013-03-21 | Realtek Semiconductor Corp | Apparatus and method for contrast control |
US8537175B1 (en) * | 2009-05-07 | 2013-09-17 | Google Inc. | Video enhancement for large scale applications |
JP5561524B2 (en) * | 2010-03-19 | 2014-07-30 | ソニー株式会社 | Image processing apparatus and method, and program |
JP5637383B2 (en) * | 2010-12-15 | 2014-12-10 | ソニー株式会社 | Image processing apparatus, image processing method, and program |
JP2013041400A (en) * | 2011-08-15 | 2013-02-28 | Sony Corp | Image processing device, image processing method and program |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2406359A1 (en) * | 1977-10-11 | 1979-05-11 | Thomson Csf | IMAGE PROCESSING METHOD AND DEVICE FOR DISPLAY SYSTEM AND DISPLAY SYSTEM INCLUDING SUCH A DEVICE |
JPH0785573B2 (en) * | 1988-08-11 | 1995-09-13 | 三洋電機株式会社 | Doming prevention circuit for color television receiver |
KR0136382B1 (en) * | 1988-08-11 | 1998-04-27 | Sanyo Electric Co | Circuitry for preventing doming phenomenon in a television and the method thereof |
US5289282A (en) * | 1991-05-28 | 1994-02-22 | Matsushita Electric Industrial Co., Ltd. | Video signal gradation corrector |
JP2936791B2 (en) * | 1991-05-28 | 1999-08-23 | 松下電器産業株式会社 | Gradation correction device |
JP3019479B2 (en) | 1991-06-28 | 2000-03-13 | 松下電器産業株式会社 | Gradation correction device |
JP3016652B2 (en) * | 1992-02-07 | 2000-03-06 | 松下電器産業株式会社 | Gain control circuit |
JPH05316446A (en) * | 1992-05-08 | 1993-11-26 | Matsushita Electric Ind Co Ltd | Multigradation correction device |
DE69414153T2 (en) * | 1993-02-24 | 1999-06-10 | Matsushita Electric Ind Co Ltd | Device for gradation correction and image recording device with such a device |
US6463173B1 (en) * | 1995-10-30 | 2002-10-08 | Hewlett-Packard Company | System and method for histogram-based image contrast enhancement |
FI104521B (en) * | 1997-01-30 | 2000-02-15 | Nokia Multimedia Network Termi | Procedure for improving contrast in image sequences |
US6038341A (en) * | 1997-03-06 | 2000-03-14 | Matsushita Electric Industrial Co., Ltd. | Histogram operating unit for video signals |
MY118136A (en) * | 1997-03-06 | 2004-09-30 | Matsushita Electric Ind Co Ltd | Image quality correction circuit for video signals |
JP2951910B2 (en) * | 1997-03-18 | 1999-09-20 | 松下電器産業株式会社 | Gradation correction device and gradation correction method for imaging device |
JPH10304275A (en) * | 1997-04-25 | 1998-11-13 | Matsushita Electric Ind Co Ltd | Television receiver |
KR100243301B1 (en) * | 1997-11-24 | 2000-02-01 | 윤종용 | Apparatus and method for expanding dynamic range |
JP2000125225A (en) * | 1998-10-15 | 2000-04-28 | Matsushita Electric Ind Co Ltd | Luminance correction device |
US6504954B1 (en) * | 1999-02-05 | 2003-01-07 | Raytheon Company | Closed loop piecewise-linear histogram specification method and apparatus |
-
2000
- 2000-06-13 EP EP00202057A patent/EP1164784A1/en not_active Withdrawn
-
2001
- 2001-05-15 KR KR1020027001856A patent/KR20020029100A/en not_active Application Discontinuation
- 2001-05-15 WO PCT/EP2001/005574 patent/WO2001097508A1/en active IP Right Grant
- 2001-05-15 EP EP01984024A patent/EP1295468B1/en not_active Expired - Lifetime
- 2001-05-15 AT AT01984024T patent/ATE281040T1/en not_active IP Right Cessation
- 2001-05-15 JP JP2002511101A patent/JP2004503959A/en active Pending
- 2001-05-15 DE DE60106761T patent/DE60106761T2/en not_active Expired - Lifetime
- 2001-05-15 CN CNB018017223A patent/CN1197349C/en not_active Expired - Fee Related
- 2001-06-11 US US09/878,682 patent/US6741295B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0197508A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE60106761T2 (en) | 2005-10-27 |
US6741295B2 (en) | 2004-05-25 |
ATE281040T1 (en) | 2004-11-15 |
JP2004503959A (en) | 2004-02-05 |
US20020057388A1 (en) | 2002-05-16 |
CN1197349C (en) | 2005-04-13 |
DE60106761D1 (en) | 2004-12-02 |
EP1295468B1 (en) | 2004-10-27 |
KR20020029100A (en) | 2002-04-17 |
EP1164784A1 (en) | 2001-12-19 |
WO2001097508A1 (en) | 2001-12-20 |
CN1383672A (en) | 2002-12-04 |
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